1794716921 has 4 divisors (see below), whose sum is σ = 1794801792. Its totient is φ = 1794632052.

The previous prime is 1794716909. The next prime is 1794716927. The reversal of 1794716921 is 1296174971.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1794716921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1794716927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17540 + ... + 62426.

It is an arithmetic number, because the mean of its divisors is an integer number (448700448).

Almost surely, 2^1794716921 is an apocalyptic number.

It is an amenable number.

1794716921 is a deficient number, since it is larger than the sum of its proper divisors (84871).

1794716921 is an equidigital number, since it uses as much as digits as its factorization.

1794716921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84870.

The product of its digits is 190512, while the sum is 47.

The square root of 1794716921 is about 42364.0994357251. The cubic root of 1794716921 is about 1215.2491308920.

The spelling of 1794716921 in words is "one billion, seven hundred ninety-four million, seven hundred sixteen thousand, nine hundred twenty-one".